Improved apparatus for rendering lard



S. MARSH. APPARATUS FOR RENDERING LARD, 6pc.

* Patented Mar. 1, 1864.

' 71 1 2/2 ewes Jh vezz tor.

UNITED STATES PATENT OFFICE,

srnvnsrnu MARSH,0F CHICAGO, ILLINOIS.

IMPROVED APPARATUS FOR RENDEFUNG'LARD, &c.

Specification forming part of Letters Patent No. ,4 I, 7S l', datedMarch 1, 1864.. v

Illinois, have invented a new'and useful Ap- 'paratus for RenderingLard, Tallow, or other Fatty Substances; and I do hereby declare thatthe following is a full, clear, and exact description of the same,reference being had to the accompanying drawings, in which- Figure 1 aperspective view, and Fig. 2 a sectional elevation, of-m y improvedapparatus. The mode of rendering lard or tallow, or other similar fattysu bstances-z'. e.,the 'Iheltin g of the raw lard, tallow, &c.'-for thepurpose of refining the same, so as to frce'them from the filaments orother foreign matter they may contain, also from the water which is heldin intimate mixture combinedwith them,

was heretofore practiced inkettles or caldrons of a semisphericalstructure established upon a fire-chamber or furnace provided with ashort chimney on one side of the saidkettle or caldron. There are manyobjections to this mode of rendering lard, &c., among which I willmention, first, impracticability of using large kettles or caldronsbecause of the dif-. ficulty attending the stirring and emptying of suchkettles, or. caldrons; secondly, waste of heat-the heat renderedavailable is that directly thrown out by the radiationfrom the fuel,while the'heat of the flame or other products of combustion is nearlywholly lost,

thirdly, liability of the lard or other fatty matter becoming scorchedor discolored; fourthly, impossibility of emptying by'means other thanladles, & o.'.

Theohject of my invention is to remove these and other ob ections auditconsists,

first, in the employment, in -the art of'rendering lard, t'allow, orother fatty matter, of an elongated semicylindrical vessel, or vesselsof v, other form substantially the same, so that large quantities ofmatter may be operated upon with ease, while the heat emitted by-theburning of the fuel is more perfectly utilized than heretofore; second,in the employment, in the art of rendering lard, tallow, or other fattymatter of an elongated heating-vessel, having at one end a drain-pipeprovided with faucets or cocks to cut oft'theflow of liquefied mass atpleasure; third, in the employment, in combination with an elongatedvessel for renderinglard, tallow',or other fatty matter provided with adrain-pipe and faucet, of a strainer within the boiler. arranged inanyconvenient manner.

To enable others to make and use my 'inven i tion, I shall now proceedto describe a rem ance with my invention, i A in the p y gl wings is thema dering kettle or boiler constructed' f i cord sonry or brick-workwhich constitutes the foundation or base to the apparatus subject ofthis patent. ber, 13, with the usual grate, ash-pit at the one end, andof a chimney, c", for carrying ofi the'smoke *and gases at the otherend, the intermediate space inclosed by brick walls performing thefunctions of a heating-flue. The front and rear walls of this base orbrick foundation are rounded on the top, and form the supports. 'of theboiler or kettle. The boiler proper, which is or may be made of castiron, or of any other metal, is of a semi-cylindrical form, somewhatlike a trough, and may be provided with horizontal flanges along the 7top, whereby it rests upon the brick-work.

The ends are closed by vertical plates P, or

convex or sphericalcaps. Near the rear end of the kettle there is avertical late and stop the flow or outlet of the refined, v

fat at pleasure.

To operate this simple yet improved kettle, no specialinstructionsar'enecessary. Theadvantages, however, should-be known forthe more intelligcnt workingiof thei apparatus.

' One man can attend to a kettle of about twenty-five feet in length bytwo and a half feet (more or less) wide and deep, and operatev at oneoperation on a mass of from three hundred to three hundred andfiftygallons of lard or tallow. He gradually throws the raw materialinto the kettle at the forward end-t. a,

the end over the fire-chamberand from time to time stirs the mass bymeans of paddles or spades, following along the sides of the boiler. Inthisway'he can stir the whole mass without inconvenience. The meltedmass forms on the bottom and the scraps float on top,

which may be taken off by means of perfov rated ladies. When the mass issufficiently It is composed of a fire-champartition, D, composed of aperforated sheet met l, for the the flow the light scraps lard, tallow,or other fatty matter, of an elongated semi-cylindrical vessel, orvessels of other form substantially the same, so that large quantitiesof matter may be operated upon with ease, while the heat emitted by theburning of the fuel is more perfectly utilized than heretofore.

2. The employment, in the art of rendering the faucet and lard, tallow,or other fatty matter, of an elongated heating-vessel, having at one enda drain-pipe provided with faucets or cocks to cut off the flow-ofliquefied mass at pleasure.

3. The employment, in combination with an elongated vesselfor renderinglard, tallow, or

or other fatty matter provided with-a drain-1 pipe and faucet, of astrainerwit-hin the boiler, arranged in any convenient manner.

In testimony whereof I have signed my nameto this specification beforetwo suhserib= ing witnesses.

SYLVESTER MARSH.

Witnesses:

A. PoLLoK, EDM. F. BROWN.

